7971845242 has 8 divisors (see below), whose sum is σ = 11958194196. Its totient is φ = 3985780512.

The previous prime is 7971845237. The next prime is 7971845267. The reversal of 7971845242 is 2425481797.

It can be written as a sum of positive squares in 2 ways, for example, as 7064570601 + 907274641 = 84051^2 + 30121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25078 + ... + 128734.

Almost surely, 2^7971845242 is an apocalyptic number.

7971845242 is a deficient number, since it is larger than the sum of its proper divisors (3986348954).

7971845242 is a wasteful number, since it uses less digits than its factorization.

7971845242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142112.

The product of its digits is 1128960, while the sum is 49.

The square root of 7971845242 is about 89285.1904965208. The cubic root of 7971845242 is about 1997.6510123753.

The spelling of 7971845242 in words is "seven billion, nine hundred seventy-one million, eight hundred forty-five thousand, two hundred forty-two".